Leather-skiving machine.



No. 760,025. PATENTED MAY 17, 1904.

J. P. SCOTT.

LEATHER SKIVING MACHINE.

APPLICATION FILED FEB.27,1901. RENEWED DEO.10, 1903.

N0 M03822 27%?6 5g 5 SHEBTS-SHEET 1.

azw

No. 760,025. PATENTED MAY 17, 1904.

J. R. SCOTT.

- LEATHER SKIVING MACHINE.

APPLIOATION FILED FEB, 2'7, 1901. RENEWED DEC. 10, 1903.

N0 MODEL.

5 SHEBTSSHEET 2 7 .v 1 W A/TUR 3; M! K, M,

. K'HOTD-LITHD.. wAsHmGIDm o. u.

No. 760,025. PATENTED MAY 1'7, 1904. J. R. SCOTT. LEATHERSKIVINGMAGHINE.

APPLIOATION FILED rma. 27, 1901. RENEWED DEO.10. 190s.

5 SHEETS-SHEET a.

7 N0 MODEL.

III /////////////%///////4'////////// ZS @mm:

PATENTED MAY 17, 1904.

J. R. SCOTT. LEATHER SKIVING MACHINE. APPLICATION FILED r1112. 27, 1991.RENEWED DBO.10. 1903.

5 SHEBTS-SHEET 4.

N0 MODBL.

ZZJQ

No. 760,025. PATBNTBD MAY 17, 1904.

' J. R. SCOTT. LEATHER SKIVING MACHINE.

APPLIUATION FILED FEB. 27, 1901. RENEWED DBO. 10. 1903. N0 MODEL. 5SHEETS-SHEET 5.

'7III/IIIIIIIIIIIIIIIIIIUI/b 'IIIIIIIIIIIIIIIIIIIIIIIIIIIIA(will/1151111, 0 I

- UNITED STATES Patented May 17, 1904!.

PATENT OFFICE.

JACOB R. SCOTT, OF BOSTON, MASSAOI-IUSETIS, ASSIGNOR TO UNITED SHOEMACHINERY COMPANY, OF PATERSON, NEW JERSEY, A COR- PORA'TION OF NEWJERSEY.

LEATHER-SKIVING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 760,025, dated May 17,1904.

Application filed February 27, 1901. Renewed December 10, 1903. SerialNo, 184,679. (No model.)

To all/6 whom, it may concern.-

Be it known that I, JAoon R. Soo'r'r, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented certain new and useful Improvements in Leather-SkivingMachines; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

The present invention relates to leatherskiving machines for producingarticles of leather, such as shoe-counters, toe-pieces, and similararticles.

In leather-skiving machines provided with a die-roller and a cooperatingpressure-roller or other suitable pressure device the blank must befirm] y seated against the bottom of the diecavity and held thereinduring the skiving operation in order that an article the exact shape ofthe die'may be produced. When such machines are provided with mechanismfor feeding the blanks to the rolls, the feeding mechanism must beconstructed and arranged to feed the blanks so that they register withthe die-cavity in the die-roller. In a commercially practical machinethe blank must be prevented from displacement in being presented to thedie-cavity and the feeding mechanism must be certain in operation.

The object of the present invention is to provide a machine of the typereferred to ofv improved and simplified construction and mode ofoperation in which the blanks are fed with certainty to the die-cavityof the dieroller and are firmly seated against the bottom of thedie-cavity and held therein during the skiving operation.

My invention is intended, primarily,'as an improvement on the machinedisclosed in my pending application, Serial No. 30,679, filed September21, 1900; but it is not limited to such machine, but may be embodied inother forms of leather-skiving machines.

In accordance with my present invention I. cause the blank to be forcedinto and seated against the bottom of the cavity in the die roller bythe action of the feeding mechanism,

which is so timed with relation to the rotation.

of the die-roller that the blank is fed into the bite of the die-rollerand pressure device and During the passage of the first half of theblank between then bent into the die-cavity.

the die-roller and pressure device the bottom of the die-cavity isreceding from the pressure device, and d urmg the passage of the lasthalf of the blank the bottom of the die-cavity is rising toward thepressure device. It is therefore necessary to bend the blank only duringthe passage of the first half of the blank bei tween the die-roller andpressure device. The

pressure device preferably consists of a roller, I and the feedingmechanism is preferably ar ranged to act on the blank only while thefirst half is passing through the rollers, the last half of the blankbeing fed forward by the My invention,

action of the rollers alone. however, is not limited to such anarrangement, but consists, broadly, in a feeding mechanism arranged tofeed a blank into the bite of a die-roller and pressure device and tobend the blank into the die-cavity.

In order to reduce the number of parts which :roller with a plurality ofdie-cavities and inproviding means whereby the roller and feedingmechanism can. be relatively adjusted to bring any die-cavity and thefeeding mechanism into cooperative relation.

It is often desirable to stop the operation of the feeding mechanism forvarious reasons, as

to prevent the feeding to the rollers of a blank which is not in properposition or to allow the operator to adjust a pile of blanks in thehopper, and in order to accomplish this result a feature of my inventionconsists in the means hereinafter described and claimed for throwing thefeeding mechanism out of operation Without stopping the machine. Bythrowing the feed mechanism only out of operation the jar and strain onthe par ts incident to stopping and starting the entire machine isavoided and the operation of the machine can be readily and quicklycontrolled by the operator.

Other features of my invention consist in an improved construction ofhopper and in an improved mechanism for feeding the blanks from thehopper.

My invention also consists in the devices and combinations of deviceshereinafter described and claimed having the advantages hereinbefore setforth and other advantages which will be obvious to those skilled in theart.

A preferred form of my invention is illustrated in the accompanyingdrawings, in which Figure 1 is a view in side elevation, partly insection, of a counter-skiving machine embodying the same. Fig. 2 is aview in end elevation of the machine shown in Fig. 1. Fig. 3 isasectional view taken on a plane passing through the center of themachine. Fig. 4is a plan View of the machine, portions being broken awayto show the underlying parts. Fig. 5 is a detail view of the die-rollerdetached. Figs. 6, 7, andv 8 are detail sectional views illustrating themanner in which the blank is forced into and firmly seated against thebottom of the die-cavity of the die-roller and securely held thereinduring the skiving operation. Fig. 9 is a detail sectional view showingthe manner in which the die-roller and pressure-roller are removablymounted.

Referring to the drawings, 1 indicates the die-roller, and 2 thepressure-roller,which are rotatably mounted in the upper part of theframe 3 of the machine supported on a hollow standard 4. The die-rollerand pressure-roller are of substantially the same construction as therollers disclosed in my pending application above referred to and areremovably mounted in the same manner. The construction by which therollers are removably mounted is illustrated in Fig. 9, in which 5designates a short shaft journaled in the machine-frame at one end ofthe die-roller, and

6 designates asleeve journaled in the machineframe at the other end ofthe die-roller. The inner end of the shaft 5 is bored axially, so thatthe inner. end of the shaft in effectconstitutes a sleeve. The sleeve 6and sleeve formed by the inner end of the shaft 5 are provided withflanges, and between the flanges the die-roller l is supported by meansof the shaft 7, which passes through thesleeve 6 and through thedie-roller and extends into the sleeve at the inner end of shaft 5. Ascrewthreaded rod 8 passes axially through the shaft 5 and extends intothe sleeve at the inner end of the shaft. The end of the shaft 7 has ascrew-threaded engagement with the rod 8 and at its outer end is.provided with a .flange 9, which bears against the outer end of thesleeve 6, so that a' rotation of the shaft 7 forces the sleeve 6 againstthe die-roll 1 and the die-roll against the sleeveat the inner end ofshaft 5 and securely locks these parts together. By rotating the shaft 7in the opposite direction the shaft can be withdrawn and the die-rollerremoved. To insure the rotation of the die-roller with the shaft 5 andthe rotation of the sleeve 6 with the die-roller and also to facilitatethe replacing of the dieroller with the die-cavity in proper positionwith relation to the other parts of the machine, the ends of thedie-roller are provided with slots which are engaged by projections 10of the flanges of the sleeve 6 and shaft 5. The construction forsupporting the pressureroller is the same as that already described forsupporting the die-roller and will be readily understood without furtherdescription.

To the outer end of the shaft 5 is secured a pinion 14 and a large gear15. The pinion 14E meshes with a pinion 16, secured to the shaft towhich the pressure-roller is locked, so that the die-roller andpressure-roller rotate in unison. The gear 15 meshes with a pinion 17,secured to the hub of a drivingpulley 18, mounted to rotate loosely upona horizontal rod or shaft 19, secured in the lower part of the frame 3.An idle pulley 20 is mounted to rotate loosely on the shaft 19 besidethe pulley 18.

The gearing above described serves as a means for continuously rotatingthe die and pressure rollers so long as the driving-belt remains on thepulley 18. 4

11 designates the skiving-knife, which is ad-. justably secured on atransverse portion of the machine-frame by means of screws 12, whichpass through slots in the knife. Screws 13, passing through. the frameof the machine and bearing against the rear edge of the knife, serve asa means for adjusting the cutting edge of the knife toward and from theline of con,- tact of the rollers. Located on the opposite side of thedie and pressure rollers from the skiving-knife 11 is a horizontalfeed-table 21, the forward end of which conforms to the periphery of thedieroller, so that the front edge of the feed-table extends in closeproximity to the line of contact of the rollers. Located abovethefeedtable 21 is a hopper for receiving and holding a pile of blanks.This hopper consists of a plate 22, which forms the front wall of thehopper, and side plates 23, which form the side walls of the hopper. Theupper ends of the plates 23 are provided with projections,

which fit over the upper edge of plate 22 and are secured thereto bymeans of screws 24 passing through slots in the projections and screwinginto the upper edge of the plate 22. By this construction the side wallsof the hopper can be adjusted to accommodate different,

sizes of blanks, and the necessity of providing a separate hopper foreach size of blank is avoided. By mounting the side walls upon the,front wall the hopper can be removed bodily from the machine. The hopperis held in position by means of vertical pins 25 on the machine-frame,between which and the bearings for the sleeves of the pressure-rollerthe ends of the plate 22 are received. Sidewise movement of the plate 22is prevented by means of lugs 26 on the plate 22, which fit inside ofthe pins 25, as is clearly shown in front wall of the hopper preventsthe passage of but a single blank from the hopper to the rollers andconstitutes a yielding guard for the forward edges of the blanks in thehopper. If the Weight ofthe hopper is not sufficient to give the desiredpressure on the bottom blank as it is fed to the rollers, leaf-springs28, hearing against the upper edge of the plate 22, may be provided, asshown in Figs. 3 and 4. For feeding the blank from the hopper to therollers a feed-slide 29 is provided, which is arranged to reciprocateover the feed-table 21and beneath the hopper. This feed-slide extendsbeyond the hopper at each side and is provided with a serrated forwardedge to engage the rear edge of the lowermost blank in the hopper. Theseserrations prevent the blank from being displaced sidewise while beingfed beneath the front wall of the hopper to the rollers and is adaptedto feed blanks of different sizes, as will be apparent. By thisconstruction of feed-slide the necessity of providing a separatefeed-slide for each size of blank is avoided. The rear side of thehopper is open, whereby the blanks can be readily placed in the hopperand any blank adjusted if out of position. In order to prevent theblanks being displaced during the backward movement of the feed-slide, aguardplate 30 is secured to the frame of the machine at the rear of thehopper and extends over the feed-slide in close proximity thereto. Thisguard plate also serves as a table to support the blanks preparatory totheir being placed in the hopper. In order to allow for the adjustmentof the guard-plate for blanks of different widths, the plate isadjustably secured to the frame of the machine by means of screws 31passing through slots in the plate. The feed-slide is reeiproeated bymeans to be hereinafter described to feed the lowermost blank in the hopper beneath the front wall ofthe hopper into the bite of the feed-rolls,as shown in Fig. (3.

As a blank is pushed forward by the feedslide its forward edge engagesthe lower beveled edge of the front wall of the hopper and lifts thewall in passing thereunder, the blanks above being heldfrom forwardmovement by the guard formed by the front wall of the hopper. In itspassage to the roller the blank is prevented from being displacedsidewise by the engagement of the serrations of the feedslide with itsrear edge and is prevented from upward displacement by the front Wall ofthe hopper, which presses it against the feed-table. In order to causethe blank to be forced into the die-cavity of the die-roller and befirmly seated against the bottom of the diecavity, the mechanism foractuating the feedslide is arranged to impart thereto a speed greaterthan the peripheral speed of the dieroller, whereby after the blank hasbeen fed into the biteof the rollers it is bent and forced against thebottom of the die, as shown in Fig. 6. The rear portion of the blank, orthe portion back of the line of contact of the rollers, is thus given agreater speed than the peripheral speed of the rollers, and the resultof this, in addition to bending the blankinto the diecavity, is to pressthe surface of the pressureroller, which is preferably of yieldingmaterial, forward into a position to hold the blank down against thebottom of the die. The backward displacement of the surface of thepressureroller, which would otherwise take place, is

thus prevented, and the pressure-roll acts to securely hold the blankagainst the bottom of the die during the skiving operation. As will beevident from an inspection of Fig. 6, the bottom of the die recedes fromthe pressure roller during the passage of the first half of the blankthrough the rollers and rises toward the pressure-roller during thepassage of the lasthalf of the blank through the rollers. The blank willtherefore be forced against the bottom of the die by the pressure-rollerduring the passage of the last half of the blank through the rollerseven if not acted on by the feed-slide. The mechanism for actuating thefeed-slide is accordingly arranged to release the blank after it haspassed half-way through the rollers, and the blank is fed the remainingdistance by the action of the rollers alone. It is desirable that thisfeeding action be performed principally, if not entirely, by thedieroller, as thereby any liability of the blank being displaced isavoided. Moreover, the pressure-roller is thus relieved of all straindue to the feeding operation, and the life of the roller, especiallywhen provided with a covering of yielding material, is appreciablyprolonged. Also the surface of theroller is not d isplaeed, as when itis used to perform the feed- 1.

ing operation, and the roller thus acts to more firmly hold the blankagainst the bottom of the die. In order to enable the die-roller toperform this feeding function, the bottom of the die-cavity is providedwith indentations in the form of grooves, as shown, which effectuallyprevent the blank from being displaced as it is forced against theskiving-knife.

In order to avoid the necessity of separate rolls for skiving blanks ofdifferent sizes or shapes or for skiving blanks of different thickness,I provide the die-roller with a plurality' of die-cavities and providemeans for relatively adjusting the die roller and the mechanism foractuating the feed-slide to bring any die-cavity and the feed-slide intocooperative relation. As shown in the drawings, the die-roller isprovided with two diecavities arranged circumforentially of thedieroller, one of these cavities being of greater depth than the other,whereby one die-cavity can be used in skiving blanks of thick stock andthe other cavity used in skiving blanks of thin stock. The means which Ihave shown in the drawings for relatively adjusting the dieroller andthe actuating mechanism of the feedslide consists in the means abovedescribed for removably supporting the die-roller. The ends thedie-roller are provided with diametrically opposite, slots. In placingthe die-roller in the machine lugs 10 on the flange of the sleeve 6 andshaft 5 enter these slots, and thereby bring one of the die-cavitiesinto proper position with relation to the actuating mechanism of thefeed-slide to receive the blank fed forward by the slide. By removingthe roller and turning it through a half-revolution the lugs 10 engagethe diametrically opposite slots, and thereby bring the other die-cavityinto position to receive the blank.

The feed-slide 29 is adjustably securedv by means of screws 32, passingthrough slots in the slide to a reciprocating block 33, mounted inguideways in the machine-frame beneath the guard-plate 30. A screw 34,having a screw-threaded engagement with the block 33 and provided with aflange 35, passing through an opening in the feed-plate, serves asconvenient means for adjusting the feed-slide on the block 33. The block33 is reciprocated by means of a link 36, which connects the block witha yoke 37, secured to the rock-shaft 38, journaled in the frame of themachine, said rock-shaft being provided with an arm 39, which carries aroll engaging a cam-groove cut in the inner face of the gear 15.

In the construction shown in the drawings above the front wall, and thecontroller, to be hereinafter described, which controls the position ofthe link is arranged to allow the linkto fall sufficiently to remove thefront wall of the slot from engagement with the pin, but not the rearwall. By reason of this construction the block 33 is disconnected fromthe link 36 only when the feed-slide is in its forward position. Thecontroller for determining the position of the link 36 consists of aroll 41, which forms a support over which the link 36 slides. The roll41 is journaled between the arms of the yoke 42, loosely pivoted on theshaft 38, and connected, by means of a rod 43, to a foot-treadle 44 atthe base of the standard 4. The treadle is normally held up against theadjustable stop 45 by means of coiled springs 46, secured to the treadleand to the standard 4, the treadle when in this position acting to lowerthe roll 41 and allow the link 36 to disengage the pin 40 when thefeed-slide reaches its forward position and to move over the rollwithout actuating the block 33. By depressing the treadle 44 the roll 41is raised, and the link 36 is brought into a position to engage the pin40. By disconnecting the feed-slide from its actuating mechanism when inits forward position the feed-slide forms a support for the pile ofblanks while being arranged in the hopper and insures the proper feedingof the bottom blank when the feed-slide is thrown into operation.

In order to prevent the shaving which is cut from the blank by theskiving-knife from passing backward over the top of the pressure-rollerand becoming wedged between the pressure-roller and the hopper or beingfed through the rollers, the front wall of the hopscribed has beenexplained in connection with the description of the construction, andfurther description thereof is deemed unnecessary.

It will be understood that the machine illustrated in the drawings andabove specifically described embodies the several features of myinvention in their preferred form only and that my invention is notlimited thereto, but may be embodied in many different constructionswithout departing from the spirit thereof.

1 Having thus described my invention,I claim as new and desire to secureby Letters Patent of the United States 1. A leather-skiving machine,having, in combination, a pressure device, a die-roller provided with aplurality of die-cavities and mechanism for feeding ablank to thedie-roller and pressure device, said die-roller being adjustable tobring any die-cavity into cooperative relation with the feedingmechanism, substantially as described.

2. A leather-skiving machine, having, in combination, a pressure device,a die-roller provided with a plurality of die-cavities and mechanism forfeeding a blank to thedie-roller and pressure device, the feedingmechanism and die-roller being relatively adjustable to bring anydie-cavity and the feeding mechanism into cooperative relation,substantially as described.

3. A leather-skiving machine, having, in

combination, a pressure device, a die-roller provided with a pluralityof die-cavities arranged circumferentially of the roller, and mechanismfor feeding a blank to the die-roller and pressure device, saiddie-roller being adjustable to bring any die-cavity into cooperati verelation with the feeding mechanism, substantially as described.

4. A leather-skiving machine, having, in combination, a feed-table,ahopper yieldingly mounted above the feed-table provided with a frontwall to form a guard for the forward edges of the blanks in the hopper,and means for feeding a blank beneath the front wall of the hopper,substantially as described.

5. A leather-skiving machine, having, in combination, a die-roller, apressure-roller, a feed-table, a hopper mounted. above the feedtableprovided with a front wall to form a guard for the forward edges of theblanks in the hopper and with a flange projecting from the front wallover the rollers, and means for feeding a blank beneath the front wallof the hopper to the rollers, substantially as described.

6. A lcather-skiving machine, having, in combination, a pressure device,a dieroller provided with a die-cavity, and feeding mechanismconstructed and arranged to feed a blank into the bite of the die-rollerand pressure device and to bend the blank into the die-cavity,substantially as described.

7. A leather-skiving machine, having, in combination, a pressure device,a die-roller provided with a die-cavity, means for rotating thedie-roller and feeding mechanism for feeding a blank into the bite ofthe die-roller and pressure device constructed and arranged to impart tothe rear portion of the blank aspeed greater than the peripheral speedof the dieroller, substantially as described.

8. A leather-skiving machine, having, in combination, a pressure device,a die-roller provided with a die'-cavity, means for rotating thedie-roller, a feed-slide for feeding a blank into the bite of thedie-roller and pressure de vice and means for imparting to thefeed-slide a speed greater than the peripheral speed of the die-roller,substantially as described.

9. A leather-skiving machine, having, in combination, a die-roller, apressure device, a feed-slide movable toward and from the dieroller andpressure device, mechanism for actuating the feed-slide, and a treadleand suitable connections for disconnecting the feed -slide from itsactuating mechanism during the operation of the machine, substantiallyas described.

10. A leather skiving machine, having, in

combination, a die-roller, a pressure device, a feed-slide movabletoward and from the dieroller and pressure device, a driving-shaft andsuitable connections for actuating the feedslide, and a treadle andsuitable connections for rendering the connections between the feedslideand shaft inoperative during the operation of the machine, substantiallyas described.

11. A leather skiving machine, having, in combination, a die-roller, apressure device, a fecdrslide movable toward and from the dieroller andpressure device, actuating mechanism therefor and means under thecontrol of the operator acting to disconnect the feed-slide from itsactuating mechanism when the feedslide reaches a predetermined position,substantially as described.

12. A leather-skiving machine, having, in combination, a die-roller,apressure device, a feed-slide movable toward and from the dieroller andpressure device, a driving-shaft and suitable connections for actuatingthe feedslide, a controller for rendering said connections inoperativewhen the feed-slide reaches a predetermined position and a treadle andsuitable connections for actuating the controller, substantially asdescribed.

13. A leatherskiving machine, having, in combination, a die-roller, apressure device, feeding mechanism, a controller acting to throw thefeeding mechanism into and out of operation at a predetermined timeduring the operation of the machine, and means under the control of theoperator for actuating the controller, substantially as described.

14. A leatherskiving machine, having, in combination, a dieroller, apressure device, feeding mechanism and means under the con trol of theoperator for throwing said feeding mechanism into and out of operationat a we determined time during the operation of the machine,substantially as described.

15. A leather-skiving machine, having, in combination, a feed-table, ahopper mounted above the feed table provided with a guard for theforward edges of the blanks in the hopper, a feed-slide provided with aserrated edge to engage the rear edge of a blank in the hopper, andmeans for actuating the slide to feed a blank beneath the guard of thehopper, substantially as described.

16. A leather-skiving machine, having, in combination, a feed-table, ahopper mounted above the feed-table provided with a front wall to form aguard for the forward edges of the blanks in the hopper and withadjustable side walls, a feed-slide provided with a serrated edge toengage the rear edge of a blank in the hopper, and means for actuatingthe slide to feed a blank beneath the front wall of the hopper,substantially as described.

17. A leatherskiving machine, having, in combination, a pressure device,a die roller provided with a plurality of die-cavities ar- In testimonywhereof I aflix my signature in presence of two Witnesses.

JACOB R. SCOTT.

ranged circumferentially of the roller, and mechanism for feeding ablank to the dieroller and pressure device, the feeding mechanism anddie-roller being relatively adjustable to bring any die-cavity and thefeeding Witnesses: mechanism into cocperative relation, substan- ALFREDH. HILDRETH, tiallyas described. FRED O. FIsI-I.

